Anchor for refractory furnace linings



Jan. 2, 1934. J, H. ROYALL ANCHOR FOR REFRACTORY FURNACE LININGS Filed Oct. 28, 1931 Patented Jan. 2, 1934 UNITED STATES PATENT OFFICE ANCHOR FOR REFRACTORY FURNACE LININGS Application October 28, 1931. Serial No. 571,583

Claims.

My invention relates to anchoring in place the refractory linings of furnaces. It is necessary that these linings be securely anchored to the outer brick wall of the furnace; and, at the same 5 time, it is very desirable that the anchoring means be sufficiently flexible to accommodate the expansion and contraction of the fire brick lining. The flexible metal anchors heretofore chor members that are themselves composed of.

the same fire brick material, but have been preformed, such refractory linings being secured to the brick wall of the furnace by suitable metallic fastening devices.

The invention further consists in the anchor for refractory furnace linings and in the parts and combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing,

Fig. 1 is a horizontal sectional view of a furnace wall and lining provided with an anchor embodying my invention,

Fig. 2 is a detail vertical sectional view and,

Fig. 3 is a perspective view of the anchor member.

The drawing illustrates a common type of furnace wall structure comprising an outer wall 1 of brick and an inner wall or lining of plastic fire brick material 2 applied thereto, said lining 2 being applied in plastic form and being permitted to harden in place. According to my invention anchor members 3 of fire brick material similar to that constituting the lining are preformed and placed in said lining 2 as it is being applied to the brick wall 1. Preferaby each of said anchor members is provided with a T-slot 4, whose stem 5 opens into the face 6 of the anchor member 3 that abuts against the outer wall 1. Said T-slots 4 receive nuts 7 on the ends of bolts 8, or other metal members that extend through metal sleeves 9 in the wall. Preferably said sleeves 9 are somewhat larger than the bolts 8. The enlarged heads 10 of the bolts 8 are preferably disposed against the first course the plastic fire brick lining in place and which of brick of the outer wall 1. A washer 11 may be inserted between the bricks and the end of each bolt 8 and a washer 12 may also be disposed between each nut 7 and the inner wall portions 13 of the T-slots 4 against which said nut 7 abuts. The anchor block 3 may be of generally frusto-conical form in section, the smaller face 6 being disposed against the face of the outer wall 1. A concave depression 14 may be formed in the face of each anchor member 3 that is farthest away from the outer wall 1.

The use of a refractory anchor device in the refractory lining eliminates the disadvantage of close contact between metal and the refractory material. The refractory anchor members 3 are easily inserted. in the plastic refractory lining 2 during the erection thereof. The metal fastening devices 8 are easily secured in said refractory anchors 3 and securely hold the refractory lining 2 against the wall. At the same time, the connection is sufficiently flexible to accommodate expansion and contraction of the lining 2.

Obviously the precise size, shape and arrangement of the refractory anchor members and of the metal connections between said anchor members and the wall may be varied in many ways without departing from the invention and I do not wish to be limited to the precise construction shown.

What I claim is:

1. A furnace wall construction including an outer brick wall having horizontal holes therein, an inner lining of plastic fire brick material applied thereto,,preformed anchor members of similar fire brick material embedded in said lining against said outer wall opposite said holes and metal bolts extending loosely through said holes and engaging said anchor devices.

2. A furnace wall construction including an outer brick wall, an inner lining of plastic fire brick material applied thereto, preformed anchor members of similar fire brick material embedded in said lining against said outer wall and metal fastening devices connecting said anchoring devices and said outer brick wall. said fastening devices having clearance in all directions in the plane of contact between said wall and said lining thereby accommodating expansion and contraction of said lining.

3. A'furnace wall construction comprising an outer wall, an inner lining of plastic fire brick material applied thereto, preformed anchor members of similar fire brick material embedded in said lining, said anchor members having T-slots with their. stem portions disposed against the sleeves provided therefor in said wall of larger diameter than said bolts, and nuts on said bolts fitting in the head portions of said T-slots.

5. An anchor device for plastic fire brick furnace linings, said anchor device having a body formed of fire brick material and having a T-slot therein and a fastening bolt thinner than said slot and having an enlarged end portion fitting in said T-slot.

JOHN H. ROYALL. 

